Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/scene/hair.h

@@ -0,0 +1,141 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "scene/geometry.h"
+
+CCL_NAMESPACE_BEGIN
+
+struct KernelCurveSegment;
+
+class Hair : public Geometry {
+ public:
+  NODE_DECLARE
+
+  /* Hair Curve */
+  struct Curve {
+    int first_key;
+    int num_keys;
+
+    int num_segments() const
+    {
+      return num_keys - 1;
+    }
+
+    void bounds_grow(const int k,
+                     const packed_float3 *curve_keys,
+                     const float *curve_radius,
+                     BoundBox &bounds) const;
+    void bounds_grow(const int k, const float4 *keys, BoundBox &bounds) const;
+    void bounds_grow(const float4 keys[4], BoundBox &bounds) const;
+    void bounds_grow(const int k,
+                     const packed_float3 *curve_keys,
+                     const float *curve_radius,
+                     const Transform &aligned_space,
+                     BoundBox &bounds) const;
+
+    void motion_keys(const Attribute *attr_P,
+                     const Attribute *attr_R,
+                     const size_t num_steps,
+                     const float time,
+                     size_t k0,
+                     size_t k1,
+                     float4 r_keys[2]) const;
+    void cardinal_motion_keys(const Attribute *attr_P,
+                              const Attribute *attr_R,
+                              const size_t num_steps,
+                              const float time,
+                              size_t k0,
+                              size_t k1,
+                              size_t k2,
+                              size_t k3,
+                              float4 r_keys[4]) const;
+
+    void keys_for_step(const Attribute *attr_P,
+                       const Attribute *attr_R,
+                       const size_t step,
+                       size_t k0,
+                       size_t k1,
+                       float4 r_keys[2]) const;
+    void cardinal_keys_for_step(const Attribute *attr_P,
+                                const Attribute *attr_R,
+                                const size_t step,
+                                size_t k0,
+                                size_t k1,
+                                size_t k2,
+                                size_t k3,
+                                float4 r_keys[4]) const;
+  };
+
+  NODE_SOCKET_API_ARRAY(array<int>, curve_first_key)
+  NODE_SOCKET_API_ARRAY(array<int>, curve_shader)
+
+  /* BVH */
+  size_t curve_segment_offset;
+  CurveShapeType curve_shape;
+
+  /* Constructor/Destructor */
+  Hair();
+  ~Hair() override;
+
+  /* Geometry */
+  void clear(bool preserve_shaders = false) override;
+
+  void resize_curves(const int numcurves, const int numkeys);
+
+  void copy_center_to_motion_step(const int motion_step);
+
+  void compute_bounds() override;
+  void apply_transform(const Transform &tfm, const bool apply_to_motion) override;
+
+  /* Curves */
+  Curve get_curve(const size_t i) const
+  {
+    const int first = curve_first_key[i];
+    const int next_first = (i + 1 < curve_first_key.size()) ? curve_first_key[i + 1] : num_keys();
+
+    Curve curve = {first, next_first - first};
+    return curve;
+  }
+
+  size_t num_keys() const
+  {
+    const Attribute *attr = attributes.find(ATTR_STD_POSITION);
+    return attr ? attr->size : 0;
+  }
+
+  size_t num_curves() const
+  {
+    return curve_first_key.size();
+  }
+
+  size_t num_segments() const
+  {
+    return num_keys() - curve_first_key.size();
+  }
+
+  bool is_traceable() const
+  {
+    return num_segments() > 0;
+  }
+
+  /* UDIM */
+  void get_uv_tiles(ustring map, unordered_set<int> &tiles) override;
+
+  /* BVH */
+  void pack_curves(Scene *scene, KernelCurve *curve, KernelCurveSegment *curve_segments);
+
+  PrimitiveType primitive_type() const override;
+
+  /* Attributes */
+  bool need_shadow_transparency() const;
+  bool need_update_shadow_transparency() const;
+  bool update_shadow_transparency(Device *device, Scene *scene, Progress &progress);
+
+ private:
+  void add_builtin_attributes();
+};
+
+CCL_NAMESPACE_END